单选题Consider the following statement： SQL EXECUTE DBMS_STATS.GATHER_SHEMA_STATS （- 2 ownname = ‘OE’， - 3 estimate_percent = DBMS_STATS.AUTO_SAMPLE_SIZE， - 4 method opt = ‘for all columns size AUTO’）； What is the effect of ‘for all columns size AUTO’ of the METHOD_OPT option？（）AThe Oracle server creates a new histogram based on existing histogram definitions for all table, column, and index statistics for the OE schema. BThe Oracle server creates a histogram based on data distribution regardless of how the application uses the column/s for all table, column, and index statistics for the OE schema.CThe Oracle server creates a histogram based on data and application usage of the column/s for all table, column, and index statistics for the OE schema. DThe Oracle server creates a histogram based on application usage, regardless of data distribution, for all table, column, and index statistics for the OE schema.
单选题
Consider the following statement： SQL> EXECUTE DBMS_STATS.GATHER_SHEMA_STATS （- 2> ownname => ‘OE’， - 3> estimate_percent => DBMS_STATS.AUTO_SAMPLE_SIZE， - 4> method opt => ‘for all columns size AUTO’）； What is the effect of ‘for all columns size AUTO’ of the METHOD_OPT option？（）
A
The Oracle server creates a new histogram based on existing histogram definitions for all table, column, and index statistics for the OE schema.
B
The Oracle server creates a histogram based on data distribution regardless of how the application uses the column/s for all table, column, and index statistics for the OE schema.
C
The Oracle server creates a histogram based on data and application usage of the column/s for all table, column, and index statistics for the OE schema.
D
The Oracle server creates a histogram based on application usage, regardless of data distribution, for all table, column, and index statistics for the OE schema.
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